For the final boss fight of Terra's scenario, the player takes control of the Lingering Sentiment in order to battle Terra-Xehanort. It will have access to any abilities Terra had equipped before the battle such as, its Keyblade preset to the Ends of the Earth. No D-Links can be used during this battle, but Command Styles and Shotlocks are still available.
In early stages of the battle, Terra-Xehanort will immediately go on the offense, usually dashing around the battlefield, surrounded in darkness. The player's best defense against this tactic is to use Guard and immediately follow with a Counter Hammer. This will do great amounts of damage to Terra-Xehanort, causing him to warp away. When the boss reappears, he may attempt a fast-paced physical attack similar to Terra's Ars Solum ability. This can be Guarded against, opening the boss to damage from Counter Hammer. He may also utilize the Shotlock Dark Volley, but the dark projectiles he fires can be deflected back at him to deal damage with Guard. Should one attempt a physical attack of their own against Terra-Xehanort, be advised that the best place to strike is from behind. This is mainly because Terra-Xehanort also has access to the Guard and Counter Hammer combo.
As Terra-Xehanort's HP starts to dwindle, his true power is unleashed. He may use a variation of the Meteor spell, causing several large rocks to erupt from the ground and bombard the player. While this attack can potentially deal heavy damage, it can be defended against with a well-timed Guard. Terra-Xehanort may also cause large pillars of rock to shoot out from the ground around him, usually when the player is at close range. He will continue to use the Darkness-based attacks from earlier stages of the battle, which can be defended against in the same ways mentioned above. Terra-Xehanort may also use the Dark Impulse Command Style, which involves him landing several hits with his Keyblade and then striking the player with an immense hand of dark energy (which can break through Guard, so dodging is advisable). Terra-Xehanort will then vanish into the ground, visible only as a pool of darkness on the ground. This pool will travel underneath the player, during which time the boss will attempt another dark hand attack. This attack requires precise timing to dodge, the player needing to wait for the pool of darkness to travel beneath them and then using the Slide ability, which can also be used to avoid many of Terra-Xehanort's...